AW: Multi-Processor Usage an Lubuntu 13.10 (64-bit) on MacBook

Thu Oct 24 22:46:44 UTC 2013

Hi,

not being a guy familiar with Mac stuff, are you seeing the error at
install? (If so, please try both installer systems) or after the system is
installed?

Regards,

Phill.

On 24 October 2013 23:07, Aere Greenway <Aere at dvorak-keyboards.com> wrote:

> On 10/24/2013 11:57 AM, Nio Wiklund wrote:
>
>> On 2013-10-24 19:30, Aere Greenway wrote:
>>
>>> On 10/24/2013 01:20 AM, Leszek Lesner wrote:
>>>
>>>> Tryout the terminal command
>>>>
>>>> Cat /proc/cpuinfo
>>>>
>>>> If this shows processor 0 and a processor 1 the system recognized two
>>>> CPUs and is using them.
>>>> The Qsynth through pulseaudio thing is bad as it had (from my
>>>> experience till pulseaudio 2.0) a bad latency. Use Alsa here instead
>>>> (needs to suspend pulseaudio first) and test again.
>>>>
>>>>  I browsed (using the file browser) to /proc, and double-clicked the
>>> cpuinfo file.
>>>
>>> It showed "Intel Core Duo 2" (something like that - I'm going from
>>> memory), and the number of cores was displayed as 1.  Information
>>> (options such as pae) was shown only for one CPU.
>>>
>>> I then tried booting the Ubuntu 13.04 amd64 live CD.
>>>
>>> When I hold down the Options key while powering up, with Ubuntu, there
>>> are two icons having the round CD icon at the right.  The first of those
>>> two, is labeled "Windows".   The second is labeled "EFI Boot".
>>>
>>> I booted the Ubuntu 13.04 DVD using the first ("Windows") CD icon.
>>>
>>> It came up, and ran fine, but system-monitor showed only 1 CPU, and the
>>> "/proc/cpuinfo" file agreed with that assessment.  There were no desktop
>>> hangs observed.
>>>
>>> I shut it down, and (again holding down the "Options" key when it
>>> powers-up) this time I selected the "EFI Boot" CD icon at the far right
>>> of the list.
>>>
>>> It immediately showed a text line saying secure boot was not available,
>>> and then presented me with a text menu with entries (as I recall):
>>>
>>> Try Ubuntu
>>> Install Ubuntu
>>> Check Disk for Defects
>>>
>>> I chose "Try Ubuntu", and it booted (eventually) directly into Ubuntu
>>> Unity desktop.  In this case, system-monitor showed two CPU's, and the
>>> "/proc/cpuinfo" file also showed two cores (and info/options about each
>>> of them).
>>>
>>> However, after awhile running, the desktop hung, and I could not do
>>> anything further but power down (I did wait quite awhile for it to
>>> un-freeze).
>>>
>>> I then tried the Lubuntu 13.10 amd64-mac live DVD, wanting to try the
>>> "EFI Boot" option, but only the "Windows" CD icon was available.  On
>>> booting this CD, only one CPU was available.
>>>
>>> I also tried selecting rEFIt on power-up, and it showed the Linux
>>> penguin icon (for the Linux partition on the hard disk), and also
>>> another penguin icon at the far right, which when highlighted, indicated
>>> it was on CD (DVD).  I selected this (far right) icon, and booted it.
>>>
>>> When it came up, it had only one CPU (the "/proc/cpuinfo" file indicated
>>> that the number of cores was "1").  The system did not hang in the time
>>> I was using it.
>>>
>>>
>>> Regarding my use of PulseAudio, I install it so that I can access the
>>> Java Sound (Gervill) synthesizer.  If I don't load PulseAudio (and
>>> pavucontrol), I cannot use that synthesizer.  On all Ubuntu variants,
>>> the Java Sound synthesizer expects PulseAudio to be used.
>>>
>>> When I re-configured Qsynth to use JACK, there were no more cut-outs on
>>> the sound.  But I (as always with Linux on this MacBook) would only
>>> produce audible sound with the laptop speakers - plugging in the
>>> amplifier cable into the headphone jack effectively shut off all sound.
>>>
>>> --
>>> Sincerely,
>>> Aere
>>>
>>>
>>>
>>>  Interesting. It seems there are fundamental problems to run an Ubuntu
>> based OS on this computer.
>>
>> Best regards
>> Nio
>>
>>  Nio, and all:
>
> I tried running an openSUSE 12.3 live-DVD on that machine, but it failed
> to run.
>
> I tried Ubuntu/Unity 13.10 i386 on it, and it (like Lubuntu) ends up with
> only one CPU.
>
> On that last attempt, I looked at the system log.
>
> I noticed (in particular) "NX (executive disable) is active".
>
> Also, in the log, I extracted the following section, which seems relevant
> to the multi-processor problem:
>
> Oct 24 21:05:35 ubuntu kernel: [    0.020314] CPU: Physical Processor ID: 0
> Oct 24 21:05:35 ubuntu kernel: [    0.020316] CPU: Processor Core ID: 0
> Oct 24 21:05:35 ubuntu kernel: [    0.020321] mce: CPU supports 6 MCE banks
> Oct 24 21:05:35 ubuntu kernel: [    0.020332] CPU0: Thermal monitoring
> enabled (TM2)
> Oct 24 21:05:35 ubuntu kernel: [    0.020347] Last level iTLB entries: 4KB
> 128, 2MB 4, 4MB 4
> Oct 24 21:05:35 ubuntu kernel: [    0.020347] Last level dTLB entries: 4KB
> 256, 2MB 0, 4MB 32
> Oct 24 21:05:35 ubuntu kernel: [    0.020347] tlb_flushall_shift: -1
> Oct 24 21:05:35 ubuntu kernel: [    0.020791] Freeing SMP alternatives
> memory: 28K (c1a3e000 - c1a45000)
> Oct 24 21:05:35 ubuntu kernel: [    0.024023] ACPI: Core revision 20130517
> Oct 24 21:05:35 ubuntu kernel: [    0.031484] ACPI: All ACPI Tables
> successfully acquired
> Oct 24 21:05:35 ubuntu kernel: [    0.031762] ftrace: allocating 27134
> entries in 53 pages
> Oct 24 21:05:35 ubuntu kernel: [    0.044112] Enabling APIC mode: Flat.
>  Using 1 I/O APICs
> Oct 24 21:05:35 ubuntu kernel: [    0.044586] ..TIMER: vector=0x30 apic1=0
> pin1=2 apic2=-1 pin2=-1
> Oct 24 21:05:35 ubuntu kernel: [    0.084546] smpboot: CPU0: Intel(R)
> Core(TM)2 Duo CPU     P7350  @ 2.00GHz (fam: 06, model: 17, stepping: 0a)
> Oct 24 21:05:35 ubuntu kernel: [    0.088000] Performance Events: PEBS
> fmt0+, 4-deep LBR, Core2 events, Intel PMU driver.
> Oct 24 21:05:35 ubuntu kernel: [    0.088000] ... version:                2
> Oct 24 21:05:35 ubuntu kernel: [    0.088000] ... bit width:
>  40
> Oct 24 21:05:35 ubuntu kernel: [    0.088000] ... generic registers:      2
> Oct 24 21:05:35 ubuntu kernel: [    0.088000] ... value mask:
> 000000ffffffffff
> Oct 24 21:05:35 ubuntu kernel: [    0.088000] ... max period:
> 000000007fffffff
> Oct 24 21:05:35 ubuntu kernel: [    0.088000] ... fixed-purpose events:   3
> Oct 24 21:05:35 ubuntu kernel: [    0.088000] ... event mask:
> 0000000700000003
> Oct 24 21:05:35 ubuntu kernel: [    0.088000] CPU 1 irqstacks,
> hard=f50e6000 soft=f50f0000
> Oct 24 21:05:35 ubuntu kernel: [    0.088000] smpboot: Booting Node   0,
> Processors  #1 OK
> Oct 24 21:05:35 ubuntu kernel: [    5.178391] smpboot: CPU1: Not responding
> Oct 24 21:05:35 ubuntu kernel: [    5.178411] Brought up 1 CPUs
> Oct 24 21:05:35 ubuntu kernel: [    5.178414] smpboot: Total of 1
> processors activated (3979.99 BogoMIPS)
> Oct 24 21:05:35 ubuntu kernel: [    5.178532] NMI watchdog: enabled on all
> CPUs, permanently consumes one hw-PMU counter.
> Oct 24 21:05:35 ubuntu kernel: [    5.180156] devtmpfs: initialized
>
> --
> Sincerely,
> Aere
>
>
>
> --
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> --
> https://wiki.ubuntu.com/phillw
> <https://lists.ubuntu.com/mailman/listinfo/lubuntu-users>
>
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